PYTHON + DATAFRAMES (pandas)   import pandas as pd   crimeData = {'agency_code': ['UT01803','TXSPD00','CA03711','MOSPD00','NY05101'], 'location': ['Salt Lake City, UT','San Antonio, TX','San Diego, CA','St. Louis, MO','Suffolk County, NY'], 'population': [191992,1463586,1400467,317095,1341453], 'homicides': [8,94,37,188,24], 'assaults': [874,5465,3601,3521,895], 'robberies': [469,1986,1378,1790,677]}   df = pd.DataFrame(crimeData) df.set_index('agency_code', inplace=True)   homicidesPerCapita = {'homicides_per_capita':[4,6,3,59,2,9]} df2 = pd.DataFrame(homicidesPerCapita)   df3 = df.join(df2) df3   Questions: Why is printing homicides_per_capita as NaN?   Sort the DataFrame by homicides per capita from greatest to least on the original DataFrame    Filter/reduce the DataFrame down to only those with more than 50 total homicides OR (not 'and') over 5000 assaults   Print the DataFrame   Thanks!

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Chapter14: Exploring Object-based Programming: Designing An Online Poker
Section14.1: Visual Overview: Custom Objects, Properties, And Methods
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PYTHON + DATAFRAMES (pandas)
 
import pandas as pd

 

crimeData = {'agency_code': ['UT01803','TXSPD00','CA03711','MOSPD00','NY05101'],
'location': ['Salt Lake City, UT','San Antonio, TX','San Diego, CA','St. Louis, MO','Suffolk County, NY'],
'population': [191992,1463586,1400467,317095,1341453],
'homicides': [8,94,37,188,24],
'assaults': [874,5465,3601,3521,895],
'robberies': [469,1986,1378,1790,677]}

 

df = pd.DataFrame(crimeData)
df.set_index('agency_code', inplace=True)

 

homicidesPerCapita = {'homicides_per_capita':[4,6,3,59,2,9]}
df2 = pd.DataFrame(homicidesPerCapita)

 

df3 = df.join(df2)
df3
 
Questions:
Why is printing homicides_per_capita as NaN?
 
Sort the DataFrame by homicides per capita from greatest to least on the original DataFrame 
 
Filter/reduce the DataFrame down to only those with more than 50 total homicides OR (not 'and') over 5000 assaults
 
Print the DataFrame
 
Thanks!
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